John peaece and ernest de la chapelle



Unirse Strains JOHN PEARCE AND ERNEST DE LA PAW CHAPELLE, 0F UITAVA, llJLanUiS.

GLASSFURN/CE.

SPECIFICATION forming part of Letters Patent No. 390,394, dated October 2, 1888.

Application led April G, 1888.

.To @ZZ whom it may concern:

Be it known that we, JOHN PEAROE and ERNEsT DE LA CHAPELLE, bol-h of Ottawa, in the county of La Salle and State of Illinois, have invented certain new and useful Improvements in GlassAFurnaces; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in the construction of glass-furnaces for their better adaptation to the use of liquid fuel.

The invention consists in theinatters hereinafter set forth, and pointed out in the appended claims.

In the accompanying drawings, Figure l is a central vertical section of a glassfurnace containing` our improvements, and Fig. 2 is a horizontal section through theline2 2 of Figi.

A represents the bed of the furnace, upon which rests the meltingpots B, and A is the circular wall surrounding` the melting chamber A?. v

C is the crown,and D is the conical chimney of the furnace.

E is the fire-box, and E is the central space or upflue, through which the flames rise from the fire-box E into the melting-chamber over the bed, whence the products of combustion pass outwardly through passages c in the eircular wall A,fsurrounding the bed A, and thence into the chimney D.

E2 represents an oil-burner, of any suitable construction, arranged in the fire-box to send its flames forward into the npflue Eand meltingehamber A2, and G is an exterior canopy or hood projecting from the sides of the furnace over the pot-holes.

Duets lfor air are provided having their in lets above the opening c', through which. the melting-pots are reached, and said duets lead to the combustionchamber E, so that they convey the hot air from outside the furnace to said coinlnistionehamber, where it may be mixed with the gases and vapor furnished by the burner and add its oxygen in a heated condition to the dames. In the best form of our invention of which we are now informed it is embodied in the devices shown in the Serial No. 269.808. (No model.)

drawings, which consist in a central flue, F, leading from the space above the crown C downward through the melting-chamber and through the center ofthe uptlue E' to the bot toni thereof, where it connects with branches F, formed in any suitable manner in the inasonry ofthe furnace,and leading from thelower end of the flue F to the opposite sides of the fire-box E, as indicated clearly in the drawings. Desirably these flues F' are curved, so as to direct their contents forwardly into the furnace fire-box in the direction taken by the combustible materials furnished by the burner,

and also desirably the outlets or mouths ot' '55 said Ilues F are arranged about opposite, or a little at the rear of opposite, the delivery end of the burner, as also shown. To convey outer air to the central flue, F, and also to obtain the benefit of the heat imparted to the outer air from the mouths of the meltingpots, we provide the canopy G, located above the potholes c, which canopy may be single and eon tinuous, as shown, or, in other words, extend` ing around the entire furnace; also over the crown of the furnace and at a little distance therefrom isloeateda sheet, CH, giving a space. f/, between the canopy and the sheet, and this space is connected with the space beneath the canopy G by any number of suitable passages, g, through the wall of the chineney-base. By the use of this canopy the air which is heated by Contact with the wall Aof the furnace, andl particularly the air which is heated at the pot-holes c', is conducted through the openings g into the space g, and thence passes downward through the central flue, F, and branch fines F into the fire-box E. By this construction the air as it is fed into the fire-box is intensely heated, having not only the benefit of the heat conveyed through the crown and wall of the flue F, but also that which it derives from the exterior of the furnace and the heat escaping from the furnace at the potholes.

It is well-known that heated air fed to a fire produces a better combustion than cold air, and we therefore make no broad claim for theuse of hot air to supply oxygen to a fire; but

Ve claim as our inventionA l. The combination, with a glass-furnace and a device for burning oil or other iiuid combustible in the lirebox thereof, of a projecting canopy over a pot-hole, and an air passage or passages arranged to take from the exterior of the furnace below the canopy air which is heated at the pot-holes and to conduct the sameinto the fire-box.

2. The coi'nbination,with a glass-furnace, of a central air-Hue, F, leading from above the crown, a passage or passages leading from the exterior ofthe furnace to the top ot' said flue, and a passage or passages leading from the lower part of said flue into the .tire box.

3. The combination,with a glassfurnace, ofv

a canopy located over the pot-holes, and an air flue or tlues leading from beneath the canopy through the melting-chamber into the re-box.

4. The co1nbination,with a glass-furnace, of a central air-flue, F, leading from above the crown and provided with a branch or branches leading into the fire-box, a sheet, G', arranged a canopy, G, exterior to the furnace above the` pot-holes, and passages leading from beneath the canopy to the space g.

5. The combination, with a glass-furnace and its lire-box containing a fluid-burner7 of a central flue, F, communicating at its upper end with the exterior of the furnace, and one or more branches leading from the lower end of the Hue F to the re-boX and having their delivery ends directed toward the rear of the rebox.

In testimony that we claim the foregoing as our invention we affix our signatures in presence of two witnesses.

JOHN PEARCE. ERNEST DE LA CHAPELLE.

lVitnesses:

EDWARD HEALEY, THOMAS RIcHARDsoN. 

